keyboard inputs for flybywire remote mcdu display

provides keyboard inputs for flybywire remote mcdu display on browser.

1. open remote mcdu display on browser (http://localhost:8380/interfaces/mcdu)
2. inject mcdu-keyboard.js into the page
3. good to go

keyboard - mcdu key mapping

keyboard code	mcdu key
F1-F6	LSK1-LSK6
F7-F12	RSK1-RSK6
A-Z	A-Z
0-9, Digit, Numpad	0-9
Tab	DIR
Insert	PROG
Home	PERF
PageUp	INIT
Enter	DATA
NumpadEnter	DATA
Delete	FPLN
End	RAD
PageDown	FUEL
Escape	MENU
ShiftLeft	AIRPORT
ArrowLeft	PREVPAGE
ArrowRight	NEXTPAGE
ArrowUp	UP
ArrowDown	DOWN
Backspace	CLR
Space	SP
Period	DOT
Slash	DIV
Minus	PLUSMINUS
NumpadSubtract	PLUSMINUS
NumpadAdd	PLUSMINUS
NumpadDecimal	DOT
NumpadDivide	DIV
NumpadMultiply	OVFY

refs

• fbw simbridge mcdu display
• fbw mcdu interface doc